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secant pile wallvdw retaining wall

In the centre o Odense, the developmento the area around Brandts Kldeabrikand Pantheonsgade has opened the wayor a two-storey underground parking.

The project drawn by architect JesperThyge Brygger comprises a new two-sto-rey underground parking o approx. 2200m2 and a our-storey oce building o2400 m2.Due to the adjoining buildings and thevery compact soil it was not possible toestablish traditional retaining walls o steelsheet piles, as both noise and vibrationswould exceed the allowed limits.

VDW retaining wall

The secant pile wall (VDW) is made oDN520 mm piles, and boring is made withan overlap o 5 cm. Every second pile (se-condary pile) is reinorced by a reinorce-ment mesh or a steel prole with enoughstrength to stand the load rom earth pres-sure, water pressure and surace load romthe adjoining buildings.The work starts with construction o aguide wall, so that the centre distance be-tween the piles corresponds exactly to therequired overlap.

Underground parking, Brandts Klde-

fabrik

A 250 rm secant pile wall anchored bydouble channel wailing and soil anchors ismade. The excavation depth is 7.0 metres,and at a short stretch the wall is placed 0.3metres rom Brandts Kldeabrik with aload o 200 KN/m rom the 26 metres highacade.The secant pile wall is bored in 10 metresdepth, and the secondary piles are reinor-

ced by HE 260B or HE 280B steel proles.Aarsle has executed the work as a sub-contract or Hansson & Knudsen A/S.

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secant pile wall

Piling

The division operates all kinds opiling and oundation projects inDenmark and abroad.

The division is one o Europeslargest piling contractors withoces in Poland, England andGermany.The vast feet covers the ullrange rom smaller rigs to largerones; in total 35 - 40 units oully hydraulic piling and drillingrigs, cranes and vibrators.

pr ar a/sHovdkoor M Oflokvj 15DK-8230 byhjDmrk

t +45 8744 2222Fx +45 8744 2549

cVR-r. 24 25 77 97

Koor Of cohgidurhom 2DK-2650 Hvdovr

Dmrk

t +45 3679 3333Fx +45 3679 3549

26.03.07nr.R-22UK

lbs

The secant pile wall is installed without noise and vibrationswhich is an important actor or projects in built-up areas. Thistechnique also oers optimum utilization ratio, as the secant pilewall can be placed as close as 5 cm rom existing buildings.

The work starts with construction of a guide wall, so that the centre distance between the piles

corresponds exactly to the required overlap.

Secant pile wall after excavation.